systemverilog pointer to function

Question

I am looking way to create same parameterized class where based on parameter methods for the class will behave differently. In C i would implement this by using pointer to function and during creation will assign this pointer to different function, so user call same API.

The only way i can find would be using class that extends from class which methods i can override, but this would require user create different class.

Can't find in SystemVerilog something like pointer to function:

void (*foo)(int);

dave_59 · Accepted Answer · 2023-05-17 15:40:11Z

0

You are correct in your thinking there are no pointers to functions in SystemVerilog and that you would have to wrap your functions in a class. This is known as the Command Design Pattern or functor, and is a routine practice. The UVM's sequence body method is an example of this.

A simpler example is using an interface class to define the common API and ask that the user implement the function

interface class API #(type P1);
   pure virtual function int foo(P1 i);
endclass
class myAPI #(int P2) implements API#(.P1(int));
   function int foo(P1 i);
      return P2;
   endfunction
endclass
...
API#(int) fp; 
myAPI#(42) imp = new; 

fp = imp;
fp.foo(54);

edited May 17, 2023 at 15:40

answered May 16, 2023 at 16:21

dave_59

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